Driver brake shoe



Feb. 16 1926.

F. L. ALBEN DRIVER BRAKE SHOE Filed Sept 20, 1923 INVENTOR J Frank L .A/be/7 WITNESSES:

AT ORNEY Patented Feb. lti, 1926.

unireo s'rars Aren't OFFICE.

FRANK L. ALBEN', 0F WILKINSBURG, PENNSYLVANIA,ASSIGNOR T0 WESTINGHOUSEELECTRIC 6t MANUFACTURING COMEANY, A CORPORATION OF PENNSYLVANIA.

nnrvnn BRAKE snon. 7

Application filed September 20, 1923.

To all whom it may concern:

Be it known that l, FRANK L. .ALnnN, a citizen of the United States, anda resident of lVilkinsburg, in the county of Allegheny and State ofPennsylvania, have invented a new and useful. Improvement in DriverBrake Shoes, of which the following is a specification.

My invention relates to railway vehicles, more especially to brakemechanisms for the driving wheels of railway vehicles having drivingmotors journalled on the wheel axles.

It is among the objects of my invention to provide a brake mechanism ofsimple and compact mechanical structure which shall be efficient in itsoperation and all the parts of which shall be readily accessible.

It is a further object of my invention to provide a brake mechanism ofthe pressureactuated type which shall beespecially applicable to railwayvehicles having motors journalled on the wheel axles and in which thelinkage and operating mechanism of the brakes are mounted on andsupported by the motor housing.

In vehicles embodying the axle-hung type of motor mountings, the brakemembers are hung from the vehicle frame in the usual po sition below thelongitudinal center line of the wheel axle. in this type of. brakemounting, the drive motors and connecting gear-wheels are inaccessibleand it is necessary to drop the car wheels from their journals to reachthe motor parts.

In my present invention, I provide a type of brake member that ismounted on the mo tor frame and is removable with the motor. The brakeshoe is mounted vertically with respect to the wheel axle and above themotor housing, which permits of free access to the drive gearsconnecting the a xle and motor shaft.

In the accompanying drawing consituting a part hereof and in which likereference characters designate like parts,

Fig. 1 is an end elevational view of a portion of a railway vehicleembodying th principles of my invention.

Fig. 2 is a side elevational view thereof.

Fig. 3 is a partial plan view of the brake shoe linkage and Figs. 1- andii are, respectively, a view in side elevation and a plan view of anadjust- Serial No. 663,736.

able bracket by means of which adjustments may be made for taking upwear on shoes.

Referring to Figs. 1 and 2, the structure therein illustrated comprisesside frames 1, having a transverse tie-rod 2 carrying a longitudinal boxgirder 3, which is formed. integral therewith. The box girder 3 is provided with laterally extending brackets'dcarrying pivot arms 5 whichconstitute a stabilizing mechanism that is no part of my presentinvention.

A drive motor 6 is journalled on a wheel axle 7 by an extension bracket8 having a vertically extending column 9, which is associated with thestabilizing arm 5. The motor 6 is geared to the axle 7 by means of agear-wheel. and a pinion 10 and 11, which are respectively mounted onthe axle 7 and motor shaft12. A gear-case 13 is disposed around thegear-wheel and pinion to protect them from grit and to provide alubricating chamber therefor.

The motor bracket 8 is provided with a plurality of vertically disposedpads 14 for mounting piston cylinders 15, and the top of the motor frame6 is provided with pads 16 for mounting brackets 17 on which bellcranks18 are pivotally mounted. An ad justable bracket 19, best shown in Figs.4

and 5, is mounted on each column 9 of the motor frame, as shown in Figs.1 and 2, and is provided with a vertically adjustable lug 20 havingteeth or jaws 21 that are adapted to engage similar jaws on the bracket19. Each bracket is further provided with an elongated opening 22 toper- 'Hllt adjustment of a stud bolt 23 extending from the lug 20. Thepurpose of this adjustment will be hereinafter set forth.

A brake lever 24: is pivotally connected to each lug 20 and has a brakeshoe 25 pivotally mounted thereon. The extended end of the lever 24 isconnected by a link 26 to the shorter arm 27 of one of the bell cranks1.8. The other end of each bell. crank is connected to a piston-rod 28,which is operatively disposed in the corresponding cylinder 15. Thecylinders 15 are joined by pipes 29, which are connected to a supplyline 30 of a suit able source of pressure, such as an air compressor orthe like. The brake shoes are thus mounted vertically over the wheelaxles and above the drive motor, thereby affording easy aecess to all.moving parts.

The operation of the brake mechanism is biefiy as follows:

The brake shoes 25 are actuated by the piston-rods 28 through the bellcranks 18, which are connected by the links 26 to the respective brakearms The brake shoes 25 are adjusted in position by adjusting the lugs20 vertically on the respective brackets 19 and securing them in theiroperative positions by tightening the nuts on the studs 23. The shoes 25are maintained in their normal operative position by adjusting bolts 31,in accordance with a familiar practice.

It will be noted that the entire brake mechanism comprising thecylinders 15, the adjustable brackets 19, and the levers and links aresupported on the-motor 6, which is an entirely novel feature of thisdesign, and gives free access to all the parts of the drive mechanismcomprising the wheel axles, motor shafts and connecting gearwheels.

It is evident from the above description to those skilled in the artthat various changes may be made in the proportion and relativelocations of the several parts without departing from the principlesherein set forth.

I claim as my invention:

1. The combination with a drive motor journalled on a wheel axle, of abrake mechanism mounted on the top of said -motor frame, said brakemechanism being operatively associated with the wheels of said axle.

2. The combination with a drive motor journalled on a wheel axle, of abrake mechanism mounted on the top of said motor frame and operativelyassociated with the wheels of said axle, said mechanism comprising aplurality of pistons operatively mounted on the motor frame, a pluralityof brake shoes, and a plurality of links and levers for connecting saidpistons to said brake shoes.

3. The combination with a drive motor j ournalled on a wheel axle, of abrake mechanism mounted on the top of said motor frame and operativelyassociated with the wheels of said axle, the shoes of said mechanismbeing in substantial vertical alinement with said axle.

The combination with a drive motor journalled on a wheel axle, of abrake mechanism mounted on said motor and opera tively associated withthe wheels of said axle, the shoes of said mechanism being insubstantial vertical alinement with said axle, and a pair ofpressure-actuated pistons secured to said motor, said shoes beingoperatively linked to said pistons.

5L The combination with a drive motor journalled on a wheel axle, of abrake mechanism mounted on said motor, said n echanism comprising a pairof shoes adapted to exert a pressure in a vertical direction on thewheels, a plurality of levers pivotally connected to said shoes andmounted. on the motor frame, and a pair of pistons operatively connectedby said levers and secured to said motor.

6. The combination with a railway vehicle drive motor, of abrakemechanism and pressure-actuated means .mounted on said motor, themechanism comprising a plurality of brake shoes adapted to engage a pairof vehicle wheels and said means comprising plurality of pistons linkedto rid shoes and secured to the motor frame.

7. The combination with a railway vehicle drive motor of a brakemechanism and pressure actuated means mounted thereon, said brakemechanism comprising horizontally disposed brake shoes in verticalalinement with a wheel axle and linker to said actuated means, andadjusting means comprising a movable bracket for said brake shoes. v

8. The combination with a railway vehicle drive motor of a brakemechanism and pressure'actuated means mounted on said motor saidmechanism being vertically located with reference to a wheel axle andthe motor, and said actuated means comprising liquid pressure cylindersbeing mounted on the side of said motor and axle.

In testimony whereof, I have hereunto subscribed my name this 11th dayof September 1923.

FRANK L. ALBEN.

